What's the "Big Crunch"?

Question

When will it happen?

Answer 1

The short answer is it's the opposite of the Big Bang. Or, since the Big Bang was the beginning of time, the Big Crunch will be the end of time. Or, if the Big Bang created everything from nothing, the Big Crunch will create nothing -- a void -- from everything.

They don't know when -- or indeed if -- the Big Crunch will occur. It all depends on gravity, and the total amount of matter, energy, and "cold dark matter" in the universe.

Right now, and for the last 14.6 billion years, the universe has been expanding. But gravity slows down the rate of expansion. If there's enough matter, the expansion will eventually come to a halt, due to gravity, and then it will begin to contract. If that happens, then eventually everything will come together in a Big Crunch, forming a big Black Hole.

And maybe out of that a new universe will form.

On the other hand, for the sake of completeness in this answer, there may not be enough matter, etc., in the universe for the expansion to come to a halt. In that case, the universe will continue expanding, and becoming more cold and less dense, forever.

Answer 2

The big crunch is a theory about how the universe will end. If the big bang blasted all matter into the universe, at some point, therefore, all matter will condense back ito that dense mass. But, it is only a theory, we will all be dead long before that happens.

Scientists are not able to find out when, because, the rate at which the universe is not decreasing, as any self-respecting explosion to do, but increasing, as if we did not have enough things to discover already. So, the question of when the big crunch is going to be, instead of being answered, is doing nothing more than raising questions about the big bang again.

Answer 3

The Big Crunch is the theoretical point in the future where gravity will cause all of the matter expelled by the Big Bang to come back into a single singularity.

Current theoretical physics is of the notion that it'll never happen, because gravity is not strong enough to stop the expansion of the universe.

Answer 4

The big crunch is supposedly the opposite of the big bang or otherwise called the "Gnab Gib" It will "theoretically occur when the momentum from the Big Bang begins to slow as the gravitation pull of all the "dark matter" begins to see the universe collapse back in on itself... there are many views of how the timescale of what's involved here will "play out" and a lot of it has to do with quasars, blackholes, and "distributions"

Answer 5

The Big Crunch is a thoery about the way the univers will end, it will implode on itself into a tiny ball of matter subatomic matter and quarks, ect and the Big Bang will happen all over again

When will it happen? when the universe stops expanding and then shrinks into a ball of who-knows-what

Personaly I don't believe this thoery, I would rather think the universe would just keep going and going and eventually slowing down until it cools off into a literal freezing heck.

Answer 6

Years ago, before science learned otherwise, it was speculated that the expansion of the universe would gradually slow down, stop completely, then begin contracting back in on itself to end in one Big Crunch. Today all observational evidence shows that this will not be the case; instead the universe will almost certainly continue to expand indefinitely.

Answer 7

The "Big Crunch" is when you bite down on a frozen Nestle's Crunch Bar and loose a filling.

Answer 8

A figment of our imaginations. Seriously.

Scientist recently discovered that not only is our universe expanding, but the rate of expansion is accellerating! This means that it is hghly unlikely that gravity will someday overtake the dark energy fueling the universe's expansion.

Answer 9

The sound that the big bug made when I stepped on it !

Answer 10

it says the univers will collapse in on its self. It can't though because of dark energy pushing it outward.